Furnace-door



(No Model.)

E. A. KERN. PURNAGB D003.

Patented Nov. 19, 1889.`

wwaow@ UNITED STATES PATENT OFFICE.

EDWIN A. KERN, OF VARREN, OHIO.

FU RNACE-DOOR.

SPECIFICATION forming part of Letters Patent No. 415,512, dated November 19, 1889.

Application filed .T une 10, 1889. Serial No. 313,760. (No model.)

To all whom it may concern:

Be it known that I, EDWIN A. KERN; a citizen of the United Stat-es, and a resident of \Varren, county of Trumbull, State of Ohio, have invented a new and useful Improvement in Furnace-Doors, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this specification.

My invention relates to doors for puddlingfurnaces; and the object is to provide a door made of case metal, having such portions as are most exposed to the heat removably secured to the body portion, so that portions destroyed maybe renewed from time to time, as occasion may require.

With these ends in view my invention relates to certain features of construction and combination of parts, as will hereinafter be described, and set forth in the claim.

Figure 1 of the accompanying drawings is a front elevation of a furnace-door, illustrating my invention; Fig. 2, a view in perspective from right rear, showing brick lining and one side cheek removed. Fig. 3 is a similar View comprising the front portions of the door disconnected.

Similar letters of reference indicate corresponding parts in all of the figures of the drawings.

As my invention is applicable to many of the approved forms of puddling-furnaces now in use, I will proceed with a description of the door, referring to the furnace only as conjunctional thereto. The body portion A of the door is provided with a Iiange a, extended across the top portion of the body, and side anges b, extending a distance down the side portions of the body A, and the arm portions, as d, extending' downwardly a distance from the body, substantially as shown in Fig. 3 of the drawings. The lower end portions of the side Iiangc b are cut away on the inside to form a gain, as f, and the rear faces of the arms d are cut away transversely, as shown, by the shoulder g2, leaving the arm portion about one-half the thickness of the body portion. There are also provided in said body portion perforations 1, 2, and 3. Side or cheek pieces B are provided in pairs, of the form substantially as shown in Fig. 3, and adapted or iitted to the body portion A,

the said side pieces having a body portion 71, a side Iiange 7c, and a bottom end flange Z. The upper back portion of the body h is cut away transversely, forming an offset g and shoulder g corresponding with a similar shoulder g2 of the body and arm portions A d. lhe outside upper end portion of the flanges k is cut away or gained, as shown at m, to correspond with the gain f on the lower portion of side iange b of the body A. The cheek B is placed upon the body A, the lower front portion n of the cheek resting 011 the inside face of the arm d, the gained portion g resting on the inside face of the body A, the outside gain m of the upper end portion of side tiange 7s resting on the inside gain f at the lower end portion of the ianges b, in which position the cheelcpiece is further secured by bolts, as o, through perforations l and 2 as provided therefor, thus forming overlapping joints, as shown.

For the lower central portion of the door a plate C is provided, having a rearwardlyprojecting re-enforoement p, rectangular in form, and having at its lower central portion a notch q, forming a bit provided with the usual opening in such doors for the introduction of the puddling-tools. The plate C, with its re-enforced rearwardly-projected portion p, is secured to the body portion A by bolts 0 through perforations 1 and 3, forming, with the flanges a, l), and 7c, a box-like portion in which the fire-brick lining D is built about the re-enforced portion p of the plate C against the inside face of the body A and cheeks B, and embraced by the anges a, la, and Z.

In use the re-enforced portion p of the plate C, by reason of its contact with the re in the furnace, will fuse and waste away, rendering that portion of the door useless. The sides or cheeks B are also liable to and do for the same reason fuse and waste away, when by reason of such destruction the parts C and B are no longer useful in holding the lining or in otherwise forming a useful portion of the door7 and as occasion requires either of the parts may be removed and a new one pnt in place without injury to the other parts, and a door constructed of the several parts hereinbefore described is not so liable to crack as when cast on one piece. Doors of this class are usually raised be- IOO side and bottoni iianges 7c and Z, having gained Or cnt-away portions g and m, which fit, re- Speetively, the shoulders g2 and eut-away portions ]'plate O, having re-enforeed portion p, provided with a noteh q, and bolts o, for removably securing the parts A B C together, substantially as set forth.

In testimony whereof I have hereunto set my hand this 24th day of May, A. D. 1889.

- EDWIN A. KERN.

/Vitnesses:

W. K. MILLER, p L. F. CARL. 

